Lock



mmzmg A. BOGE LOCK Filed Aug. 2a". 1921 2 Sheets-Sheet 1 A. BOGE LOCK I Filed Aug. 26. 1921 nmzms Patented Get. 30, 1923..

warren I e ADOLF EDGE, OF SOLINGEN, GERMANY.

LOCK.

Application filed August 26, 1921. Serial IE0. 195,569.

(GRANTED UNDER THE PROVISIGNS 0.? THE 1101 GE E5303. 3, 1921, 41 STAT. L, 1313.)

To all whom it may. concern:

Be it known that I, ADoLr Boers, a citizen of the German Republic, residing at Solingen, Rhenish Prussia, Germany, have invented certain new and useful Improvements in Looks (for which I have filed application in Germany February 8, 1918, and

July 18, 1919; France, July 10, 1920;

Sweden, June 30, 1920; Switzerland, July 17 1920; England, July 17, 1920), of which the following is a specification.

This invention relates to a. safety door lock and the like in which the movement of the bolt is effected by a bolt-driving memher that is permanently seated in the main lock and adapted to be moved through the agency of cylinder locks cooperating with it and arranged one on each side of the door.

A salient feature of the invention con sists in the bolt-driving member, which is held in its intermediate position by a spring member, being provided at each of its two ends with an opening adapted to receive the end of the key, so that the latter can be thrust both from the inner and outer sides of the door through the particular cylinder lock straight 'into a bolt-driving member so as to-efi'ect the coupling between the rotary portion of the cylinder lock and the bolt-driving member. The bolt-driving member, which is preferably journalled in the walls of the main lock and on studs projecting from the cylinders of the cylinder locks arranged opposite toeach other in the a door, i equipped with teeth that mesh with teeth on the lock bolt. The two cylinder locks are preferably connected with the main locks by means of screws that pass through a slot in the bolt and serve also as guide members for the latter, thevheads of the screws being covered by a cover-plate which is locked in position in a peculiar manner so as to prevent the screws being tampered with by unauthorized persons.

By this arrangement a lock is obtained that is simple, occupies little space, is reliable in action and affords great security against opening by unauthorized persons.

One embodiment of the invention in which a mortise lock isused is illustrated in the drawing in which Fig. 1 shows the mortise-lockby itself v with cover removed, partly in elevation and partly in section, I

Fig. 2 the same but with the latch drawn back,

Fig. 3 the same with the latch locked in its forward position, and

Fig. 4. shows the bolt-driving member by itself in four different views.

"Fig 5 shows an end view of the lock, partly in section,

Fig. 6 is a plan view of the entire safety lock mounted in the door,

Fig. 7 illustrates the method of preventing the removal of the fastening screws of the lock by unauthorized persons,

Fig. 8 the cover plate that renders the screws inaccessible partly dislodged.

The two cylinder looks I, 2, each arranged on a side of the door and inserted in a hole therein, have the usual construction and so that the three parts oftheenti're look aresecured in correct relative positions.

The head 8 of the latch is guided in the turned-up part 9 of the mortise-lock a d in cut-out portions 10 of the lock-walls 6, 7, and is rigidly connected with a transverse piece 11, which is guided by means of rods 12 in guide-blocks 13 and also abuts against springs 14, which tendto hold the latchhead 8 in the position wherein it acts as latch or to press it back into this position (Figs; 1 and 6). 15 is the stem of the latch which stem by means of a slot 16 is guided on the fastening screws 3,, 1 of the cylinder looks so as to be longitudinally slidable to and fro and, by means of a threaded pin 17 and a slot 18, is so connected with the latch head 8 that the latter can be moved independently of the stem 15 within certain limits and be drawn back into the lock, e. g. by means of a pressure member acting on the arm 19, independently of the cylinder locks for the purpose of operating the latch while the latch-stem 15 is locked.

The movements of the latch 8, 15, here serving simultaneously as bolt, are given by means of the cylinder locks through the intermediary, according to the invention, of

the member shown by itself in Fig. 4 in various views, which member is composed of two bush-like end portions 20, 21 and of the two pin teeth 22 connecting these portions together and-arranged diametrically opposite each other and'is journalled in the walls 6, 7 of the mortise-lock 5. Moreover in the example the two end portions 20, 21 of said member have a hole 23 similar to a key-hole into the circular part of which extends as axial stud or pin at on the inner cylinder 25 of each adjacent cylinder lock, so that the member can turn freely on these pins 2a. The inner cylinder 25 of one or the other cylinder lock is coupled with said member, so as to turn therewith, by means of the key 26 inserted into this particular lock, and, in theexample, in such a way that said hey engages directly into the slotted part of the hole in the member (Fig. 5, left).

Now the bolt-driving member by means of its two teeth 22 engages with a toothed portion of the bolt-stem 15, which portion in the example is formed by the four slit-like notches 27, 28, 29, 30, so that, by the rotation of the inner cylinder of one of the cylinder locks and of the-said member coupled 'with it the bolt-stem 15 is pushed from the latching position (Fig. 1) into the locking position of bolt head 8 (Fig. 3) or vice versa, the two pin teeth 22 of the member, in these positions corresponding to the final positions of the cylinder locks, being located one behind the other in the direction of boltmovement, each then engaging in one of the slots in the bolt-stem, as will be understood from Figs. 1 and 3. In this way the boltdriving member also serves to securethe latch stem 15 in the two said positions, so that the provision of a separate tumbler therefor is unnecessary. I

To hold said member 2021 safely in the said securing or looking positions, there is provided a resilient abutment, which in the example consists of a lever 83 having a spring 31 which bears against a pin 32 and presses on a flattened part 84: at the side of the member.

In the.latching posititon shown in Fig. 1 the bolt stem 15 holds the latch-head 8 in its usual position, wherein it actually functions as a latch. The slot 18 in this case enables the latch-head 8 tobe drawn back into the lock against the action of the springs 14 in order to open the latch closure, for example, by means of a pressure device acting on the arm 19. Now when the bolt stem 15 is moved forward into the position shown in Fig. 3,the latch-head is thereby locked in that forward position in which'i't acts as a bolt. In this position the pin-17 prevents the latch head being pressed back. Finally in order to be able to draw said head bacl:

into the look from its Fig. lpositionby means of one or the other of' the cylinder locks, the slot 30 in the bolt stem is inclined drawn back farther than if the slot 30 were vertical (Fig. 2).

To prevent the fastenin screws tfrom being removed by unautfiorized persons, their countersunk heads are arranged in a groove 10 in the face of the cylinder lock 1 that is situated on the inner side of the door as shown in Figs. 7 and 8. The sides of: this groove 40 are dovetailed, and the continuity of the lower side is interrupted as shown in Fig. 7 by a part of the rotary cylinder 25 projecting into it when'this cylinder is in its normal position. But when the cylinder is turned through the 180, i. e., into the position illustrated in Fig. 8, ailat portion 42 of the same registers with the groove so that'no narrowing of the latter takes place and the cover plate 411 can be slipped into place. This plate has a notch 13 at the middle of its lower edge that registers with the part of the cylinder that projects into the groove. Hence when the plate is pushed home and the cylinder-turned into its normal position, Fig. 7 ,the former is secured against efforts to dislodge it. .Thus the fastening screws can only be removed at the inside of the door, and even then onlyv when the cylinder is turned by the key into the off normal position shown in F 1g. 8 and the cover plate 41, after being thus unlocked, is removed.

I claim; i

1. A safety door lock comprising a toothed bolt; bolt-driving member consisting of two rings with a key-opening in each and pins connecting the rings and adapted to engage with the teeth of the bolt; cylinder locks arranged at opposite sides of the door and havingkey-passages in line with the said key-openings, a'key adapted to be inserted through any of the said key-passages into a said opening and to thus couple is; cylinder lock with the bolt-driving mem- 2. A safety door lock comprising a toothed bolt; a bolt-driving'member consisting of two rings with a key-opening in; each and pins connecting the rings and adapted to engage with the teeth of the bolt cylinder locks arranged a opposite sides of l member with key-openings at two ends, cylinder locks at opposite sides of the door with key-passages in 'line with the said keyopenings, a key adapted to be inserted through any of the said key-passages into a said opening and to thus couple a cylinder lock with the bolt-driving member, and fastening screws for commonly connecting the cylinder looks with said main lock, said screws passing through the slot in the bolt of the main lock and acting as; guide members for the bolt.

4. A safety door lock comprising a main lock with a bolt, a bolt-driving member with key-openings at two ends, cylinder locks at opposite sides of the door with key-passages in line with the said key-openings, a key adapted to be inserted through any of the said key-passages into a said opening and to thus couple a cylinder lock with the boltdriving member, fastening screws for commonly connecting the cylinder looks with said main lock, said screws passing through the main lock, and means for normally rendering the said screws inaccessible, said means consisting of a notched cover-plate held in a position in which it covers the heads of the said screws by the cylinder of a said cylinder lock normally projecting into the notch of the plate and being adapted to release the plate only when the cylinder lock is unlocked.

In testimony whereof, I aflix my signature in the presence of two witnesses.

ADOLF BOGE. Witnesses:

OTTO FISCHER, CLARE WELLER. 

